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[" Let "A" and "B" be finite sets and "P...

[" Let "A" and "B" be finite sets and "P_(A)" and "P_(B)" respectively "],[" Q."4" denotes their power sets.If "P_(B)" has "112" elements "],[" more than those in "P_(A)" .Then the number of functions "],[" from "A" to "B" which are injective is "]

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